Comparison of Effectiveness between Cobalt ChromiumRods versus Titanium Rods for Treatment of Patients with SpinalDeformity: A Systematic Review and Meta-Analysis

Biomechanicalpropertiesofrodsdeterminetheirabilitytocorrectspinaldeformityandpreventionofpostoperativesagittal and coronal changes. /e selection of a proper rod material is crucial due to their specific mechanical properties thatinfluencethesurgicaloutcome./epurposeofthisstudyistocomparetheeffectivenessofcobaltchromiumrodsversustitaniumrods for the treatment of spinal deformity by a systematic review and meta-analysis.Methods. PubMed, EMBASE, and theCochrane library were searched for observational and biomechanical studies comparing cobalt chromium and titanium rods interms of correction rate, thoracic kyphosis, lumbar lordosis, incidence of rod fracture, fatigue life of contoured rod, bendingstiffnessofrods,andoccurrenceofproximaljunctionalkyphosis./edemographicdataandmeanvaluesofoutcomesofinterestwere extracted from each group and compared by their mean difference as an overall outcome measure. /e Review Managersoftware (RevMan 5.3) was utilized at a 95% significance level.Results. Eleven eligible studies with 641 participants for 7 ob-servational studies and 35 samples for 4 biomechanical studies were identified. /ere were no significant differences betweencobaltchromiumandtitaniumrodsinthecorrectionrateofspinaldeformity.Postoperativethoracickyphosiswaswellrestoredinthecobaltchromiumgroupwithstatisticalsignificance(pvalue�0.009)./eincidenceofrodfracturewashighintitaniumrodscomparedtocobaltchromiumrodswithsignificantdifference(pvalue�0.0001).Proximaljunctionalkyphosisoccursmoreinthecobaltchromiumgroupwithasignificantdifference(pvalue�0.0009).Nostatisticalsignificancebetweentwomaterialsintermsoflumbarlordosis,fatigueoflife,andbendingstiffnessofrods.Conclusion./ecobaltchromiumrodisbetterthantitaniumrodforeffectivecorrectionofspinaldeformityandpostoperativestabilityofthespine.However,theuseofcobaltchromiumrodsisassociated with increased risk of proximal junctional kyphosis.